Hundreds Of Climbers Turned Out For The Ninth Annual September 11th Memorial Stair Climb At Bristol Motor Speedway Over The Weekend. To Pay Honor 9/11 First Responders, Participants Climbed The Steps Of The Grandstands Equal To That Of The 110 Stories Of The Twin Towers Of The World Trade Center. It’s Been 22 Years Since The Terror Attacks In New York City And The Pentagon In Washington D.C.